پاورپوینت Photosynthesis & The Hill Reaction

پاورپوینت Photosynthesis & The Hill Reaction

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فرمت فایل اصلی: PowerPoint (pptx) (قابل ویرایش و آماده پرینت)
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پاورپوینت Photosynthesis & The Hill Reaction (pptx) 25 اسلاید

دسته بندی : پاورپوینت

نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )

تعداد اسلاید: 25 اسلاید

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Photosynthesis & The Hill ReactionChloroplastsPhospholipid bilayerDark Reaction – Calvin CycleLight Reaction - ETC PhotosynthesisChloroplasts of plants capture light energy from the sun and convert it to chemical energy stored in sugar and other organic molecules6CO2 + 12H2O + light energy C6H12O6 + 6O2 + 6H2OPhotosynthesisFigure 8.3 in LifeThe Three Parts of PhotosynthesisETCPhotosystem IIPhotosystem ICalvin-Benson CyclePhotosystems are light reactions because they directly require light to proceedCalvin-Benson Cycle is a dark reaction because it doesn’t directly require light to proceedElectron Transport ChainPhotosystem II occurs first – Does anyone know why II is first?Step 1Photosystem II absorbs lightAn e- is excited to a higher energy level in the reaction center chlorophyll (P680) and is captured by primary e- acceptorOxidized chlorophyll is now a very strong oxidizing agent (e- hole must be filled because it wants an e-)Electron Transport ChainStep 2An enzyme extracts e- from H2O and supplies them to P680Replaces each e- that chlorophyll lost when it absorbed light energyRxn splits water molecule into 2-hydrogens and 1-oxygen molecule2 Oxygen molecules form O2Electron Transport ChainStep 3Photo-excited e- passes from primary e- acceptor of Photosystem II to Photosystem I by way of ETCStep 4e- cascade down ETC exergonic fall to lower energy level is harnessed by the thylakoid membrane to produce ATPThis ATP provides energy for the synthesis of sugar during Calvin cycleElectron Transport ChainStep 5e- reaches bottom of ETC it fills e- hole in P700 (reaction center in Photosystem I)Replaces each e- that chlorophyll lost when it absorbed light energye- is excited to a higher energy level in the reaction center chlorophyll (P700) is captured by primary e- acceptor